[SOLR-9931] hll omits value in distributed mode when no values in field

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.4, 7.0
• Component/s: Facet Module
• Assignee: Yonik Seeley
• Reporter: Yonik Seeley
• Created: 05/Jan/17 14:33
• Updated: 08/Jun/19 15:33
• Resolved: 06/Jan/17 02:15

Description

Given a non-empty bucket, but hll of a field with no values for that bucket domain

• In non-distributed mode, hll returns 0
• In distributed mode, the key+value is omitted entirely

We should make these consistent.
In this case, what makes the most sense is to return 0 for both.